Encycloedia Britannica. Social contract. Encyclopædia Britannica Premium Service. http://www.britannica.com/eb/article?tocId=9068440

International Information Programs. The Federalist No.10 (1787). http://www.constitution.org/fed/federa10.htm

Learning to Give. Briefing Paper: Enlightened Self-Interest by James B. Steenbergen. /papers/paper23.html

National Archives Experience. The Bill of Rights. http://www.archives.gov/exhibits/charters/bill_of_rights.html

National Archives Experience. The Declaration of Independence: A Transcription. http://www.archives.gov/exhibits/charters/declaration.html

Tocqueville, Alexis de. Democracy in America. (Originally published 1835). Chicago: University of Chicago Press, 2000. ISBN: 0226805328.